March 30, 1907

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Features

A City of Towers

Naval Marksmanship

Metallic Sodium as a Conductor for Electric Currents

Electric Traction Vindicated

The Death of Pierre Berthelot

The Gasoline Motor in Shallow-Draft Vessels

By the Engliish Correspondent of the Scientific American

New French Aeroplanes

A Twentieth Century Campanile

An Optical Illusion

By Gustave Michaud

Excavations at Naga-Ed-Der, Where Prehistoric Man First Settled in Egypt

By Enos Brown

A New High-Speed Photographic Shutter

A New Rifle Sight

Dish Drainer

Carpet Stretcher

An Improved Concrete Wall Construction

A Novel Flag Holder

An Improved Bit Brace

Safety Cock

Oddities in Inventions

Electric Gas-Lighter for Acetylene Automobile Lamps

Departments

Departments

The Heavens in April

Correspondence - March 30, 1907

Recently Patented Inventions - March 30, 1907

Notes and Queries - March 30, 1907

Index of Inventions - March 30, 1907

Patents - March 30, 1907

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